... These factors are coupled with each other during the chemical propagation in the reservoir and that complicates the fluid-flow process. Coreflooding method is a useful tool to investigate these factors. Zhou et al. (2012) and Wang et al. (2015) have investigated the dynamic adsorption...

..., TDS=15,000 mg/L; T=90°C, TDS=100,000 mg/L). Then the capacities of the SP formulations with the novel sulfobetaine surfactant have been studied, including the anti-adsorption ability, long term stability, emulsifying capacity, stripping film, injectivity, dynamic adsorption. At last, the oil...

... The magnitude of polymer adsorption is one of the key factors in determining the economic viability of polymer flooding. The adsorption processes are known to be closely related to reservoir parameters such as accessible surface area, salinity, temperature, and polymer bulk size. The adsorption...

... and its IFT with crude oil is measured. Static Adsorption Abstract Surfactant-polymer (SP) flooding is one of the most promising methods in enhanced oil recovery (EOR), especially where an existing waterflooding infrastructure is in place. This work is part of a broader research theme in which...

... Properties Foam generation, adsorption and decay were modeled by chemical reactions, using two water components, to represent surfactant and foam, and a solid component. Surfactant is injected in the water phase and generates foam in the presence of gas. This reaction is assumed to be instantaneous...

... temperature is reached, iii ) THRs remain stable over period of time superior to one year in reservoir conditions; iv ) coreflooding experiments in sandstone rocks show moderate adsorption (around 50 μg/g), good injectivity below gel temperature and strong pressure build-up once gel temperature is reached...

... the amount of surfactant needed in two ways. First, alkali reduces surfactant adsorption by increasing the rock surface's negative charge density, making it preferentially water-wet. Second, alkali reacts with the acids in the crude oils to produce in situ soaps, which in turn broadens the optimal salinity...

... removal, is occurring [ 2 ]. Partial or total removal of iron-containing minerals may result in an artificially-low surfactant adsorption. Wang notes that adsorption of surfactants on individual clay minerals is lower after treatment with dithionite than under preserved, anaerobic conditions...

... Abstract In this paper, we present a new route to mitigate surfactant retention in chemical EOR projects. Surfactants retention, either through adsorption on reservoir rocks or phase trapping, is one of the main constraints to achieve high performance and economical chemical EOR. Specific...

... characteristics are given in Table 2 In parallel with the enhancement of the monitoring, increasing the reliability of the prediction is necessary. In particular, the extrapolation of laboratory results to prepare field scale simulation inputs (for instance residual resistance factor, or adsorption) are key...

... synthetic EOR polymers. Upstream Oil & Gas enhanced recovery adsorption polymer flow in porous media ppm HMSPAM viscosity retention Oil Recovery Hmspam Injection Rate molecular weight chemical flooding methods Fluid Dynamics Hydrophobically polymer concentration mobility reduction...

... understanding of the processes and favorable economic conditions. For robust production forecasts, various uncertainties due to complex chemical processes should be quantified thoroughly. Some of the important uncertainties for full field production forecasts are chemical adsorption on rock surface...

... model viscosity asp model enhanced recovery adsorption optimum salinity surfactant modeling & simulation concentration phreeqc oil-water interfacial tension interfacial tension oil recovery experimental data upstream oil & gas oil production history alkali permeability...

... enhanced recovery concentration dalton daqing oilfield molecular weight chemical flooding methods adsorption polymer flooding application spe 144251 upstream oil & gas enhanced recovery rate coefficient heterogeneous reservoir high concentration viscosity recovery rate high...

... between the injection and production wells. This resistance against flow is created by polymer viscosity, adsorption, and retention in pore throats in the thief zone and diverts chase water to displace unswept oil in adjacent zones as shown in Fig. 2 . The strength of the resistance factor in the thief...

... the CO 2 and aqueous phases minimize wasting expensive surfactant in water that is never contacted with CO 2 . This novel CO 2 soluble surfactant concept diversifies injection strategies with respect to operational constraints, broadening the application of foam process. adsorption soluble...